Question

З 613. Спростіть вираз:
1) х(х + 1)(х + 2) - 3(х – 2)(х + 2) + 2(x — 6);​

Answer 1

$= x( {x}^{2} + x + 2x + 2) - 3( {x}^{2} - 2x + 2x - 4) + 2x - 12 = \\ {x}^{3} + 3 {x}^{2} +2 x - 3 {x}^{2} + 12 + 2x - 12 = \\ {x}^{3} + 4x$